<template>
  <div class="singer">
    <list-view @select="selectSinger" :data="singers"></list-view>
    <router-view></router-view>
  </div>
</template>
 <script type="text/ecmascript-6">
   import {getSingerList} from 'api/singer'
   import {ERR_OK} from 'api/config'
   import Singer from 'common/js/singer'
   import ListView from 'base/listview/listview'
   import {mapMutations} from 'vuex'
   
   const HOT_NAME = '热门'
   const HOT_SINGER_LEN = 10

    export default {
      data() {
        return {
        singers: []
      }
      },
      created() {
        this._getSingerList()
      },
      methods: {
        selectSinger(singer) {
          this.$router.push({
            path: `singer/${singer.id}`
          })
          this.setSinger(singer)
        },
        _getSingerList() {
          getSingerList().then((res) => {
            if(res.code === ERR_OK) {
              this.singers = this._normalizeSinger(res.data.list)
            
            }
            })
          },
          _normalizeSinger(list) {
            let map ={
              hot: {
                title: HOT_NAME,
                items: []
              }
            }
            list.forEach((item, index) => {
              if (index < HOT_SINGER_LEN) {
                map.hot.items.push(new Singer({
                  id: item.Fsinger_mid,
                  name: item.Fsinger_name
                }))
              }
              const key = item.Findex
              if (!map[key]) {
                map[key] = {
                  title: key,
                  items: []
                }
              }
              map[key].items.push(new Singer({
                id: item.Fsinger_mid,
                  name: item.Fsinger_name
              }))
            })
            let hot = []
            let ret = []
            for (let key in map) {
              let val = map[key]
              if (val.title.match(/[a-zA-Z]/)) {
                ret.push(val)
              }else if (val.title === HOT_NAME) {
                hot.push(val)
              }
            }
            ret.sort((a,b) => {
              return a.title.charCodeAt(0) - b.title.charCodeAt(0)
            }) 
            return hot.concat(ret)
          },
          ...mapMutations({
            setSinger: 'SET_SINGER'
          })
        },
        components: {
          ListView
        }
      }
 </script>
 <style scoped lang="stylus" rel="stylesheet/stylus">
   .singer
     position : fixed
     top: 88px
     bottom: 0
     width: 100%

</style>
 
